/**
 * 代码扩展，用于简化代码编写
 * author   : jxyi
 * date     ：2017-3-11
 */

String.prototype.format = function (args) {
    if (arguments.length > 0) {
        var result = this;
        if (arguments.length == 1 && typeof (args) == "object") {
            for (var key in args) {
                var reg = new RegExp("({" + key + "})", "g");
                result = result.replace(reg, args[key]);
            }
        }
        else {
            for (var i = 0; i < arguments.length; i++) {
                if (arguments[i] == undefined) {
                    return "";
                }
                else {
                    var reg = new RegExp("({[" + i + "]})", "g");
                    result = result.replace(reg, arguments[i]);
                }
            }
        }
        return result;
    }
    else {
        return this;
    }
} 